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Strabismus refers to misaligned eyes. Esotropia (crossed eyes) occurs when the eyes turn inward. Exotropia (wall-eye) occurs when the eyes turn outward. When one eye is higher than the other it is called Hypertropia (for the higher eye) or Hypotropia (for the lower eye). Strabismus can be subtle or obvious and can occur constantly or intermittently. It can affect only one eye or alternate between both eyes.

Strabismus usually is noticed and begins in infancy or childhood. With the exception of accommodative strabismus, which is caused by a need for glasses for farsightedness, the cause for strabismus is not well known. Children usually have no symptoms. Adults who develop it, however, have significant double vision. Children and adults both lose their depth perception when the eyes are not aligned properly.

In children, amblyopia or lazy eye may develop in untreated strabismus. In some cases patching and glasses will correct the problem, but in most cases surgery is indicated to realign the eyes


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